Personally I am against geoengineering, and I speak out against cloud seeding which is another form of geoengineering. The main reason is it makes no sense. The air can only hold so much water content and when they make it fall, they are stealing water from crops and ecosystems down wind. A classic example of human attempt to solve a problem they created by causing more problems. We have plenty of it examples when it comes to invasive species. Introducing them, then screwing things up more by trying to stop them. A learning curve that is deadly.